Database management

PostgreSQL 18: Change the maximum number of autovacuum workers on the fly

For PostgreSQL it is critical, that autovacuum is able to keep up with the changes to the instance. One of the parameters you can adapt for this is autovacuum_max_workers. This parameter controls how many worker process(…)

FreeBSD basics – 5 – Providing services using Jails

This post builds on top of the previous post in which we’ve created a simple thin Jail. The goal of this post is, to put a bit of automation around this and to provide a simple(…)

PostgreSQL: Maybe we should give ZFS a chance (3) – testing with an aligned record size

In the last post about PostgreSQL on ZFS the pgbench tests showed, that ZFS was slower for the standard tests compared to ext4 on Debian. A comment to that post made me wonder if changing the ZFS record size(…)

PostgreSQL: Maybe we should give ZFS a chance (2) – testing

In the last post we’ve set the baseline for comparing ext4 to zfs when it comes to PostgreSQL. We’ve ended with two PostgreSQL clusters, one running on the ext4 file system while the other is running(…)

New SQL Server Management Studio Version 21 – First Test

Last week, at the Pass Data Summit, they announce the new version of SQL Server Management Studio: SSMS 21 You can find the preview in here. It’s a good opportunity to test this new version before installing it by(…)

PostgreSQL: Maybe we should give ZFS a chance (1) – baseline

Recently I’ve switched my PostgreSQL playground from Linux to FreeBSD. Not because I don’t like Linux anymore, just because I like trying out other operating systems and see what works the same and what is different.

PostgreSQL: Partitioning an existing table (almost) online using table inheritance

The PostgreSQL mailing list archives are a wonderful place to get new ideas just by reading through random posts. This time I found an interesting idea on how to partition an existing(…)

PostgreSQL: Delaying authentication to debug a process

While investigating a customer issue (details here) one of the replies suggested to use pre_auth_delay to add a delay before a session is authenticated. Even if this was not useful for the actual issue, this(…)

2024.pgconf.eu – Bigger than ever, the family is growing fast

The PostgreSQL community is growing every year and the same happens for pgconf.eu, which happened in Athens, Greece, this year. Attending this event is one of the best opportunities to get in touch with the people behind PostgreSQL. This year(…)

Improved not null/null planning in PostgreSQL 17

PostgreSQL 17 came with quite some additional features for the optimizer. One of them is about “is null” and “is not null” handling when column have a “not null” constraint defined. In the past it was(…)